College Math Formulae Lite - Math Formulae Lite is a unique app that is particularly designed for College Grade/Higher Grade Students. It lists out all the important formulas in Algebra, Trigonometry and Calculus. Regular review of these formulas/concepts will definitely help improve your grades
Math Ref Free - Math Ref Free is a free version of the great math reference application, Math Ref. This app gives you just a sample (over 600) of the many (over 1,300) helpful formulas, figures, tips, and examples that are included in the full version of Math Ref. So, if you are a student, teacher, or need math for work and want to try before you buy, this app is for you
Kids Math - This is an educational math game for your kids and, why not, maybe for everyone (you can improve your math calculations speed).
This game is good because:
1) The questions are generated dynamically, so you will get new questions each time you play the game
RandGen is a random-number generator for Android. The distribution of the generated numbers can follow various distributions and the seed used by the random-number generator can be created randomly with various methods (e.g. using the accelerometer)
Math Blitz (Android) - Find out who's the best and fastest Math Blitzer by competing against your friends to solve simple math problems in real-time!
Add Facebook and Twitter friends, compete on leaderboards, enjoy multiplayer mode, and chat in game rooms
Truth Tables - The sole purpose of this program is generating, and displaying, truth tables.
This free version supports all usual connectives of classical logic, that is negation, conjunction, (inclusive) disjunction, conditional (material implication), and biconditional (material equivalence), as well as the constants 1 and 0 denoting truth and falsehood, respectively
Calculus Quick Reference lists down all the important formulas and evaluation techniques used in calculus which makes it easier for you to memorize and apply them in solving problems